Farm Equipment - D17 IV Diesel Oil Pressure

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D17 IV Diesel Oil Pressure

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=159249
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Topic: D17 IV Diesel Oil Pressure

Posted By: Dave (NE)
Subject: D17 IV Diesel Oil Pressure
Date Posted: 21 Mar 2019 at 9:52pm

My D17 IV diesel oil pressure gauge always is maxed out. When the engine is turned off, the gauge goes down to zero. Is this an issue with the gauge or could the pressure be too high? I've known low pressure is not good, but is high pressure bad? My D17 gas oil pressure gauge runs at about 3/4 of the way up in normal. Just wondering if I have a problem. Dave

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Do not argue with an idiot. He will drag you down to his level and beat you with experience. Mark Twain.

Replies:

Posted By: DougS
Date Posted: 21 Mar 2019 at 9:58pm

High pressure could mean that something is plugged or it could mean a bad gauge. Try a different gauge. If the gauge appears to be good, try another oil filter. If that doesn't fix it I'd pull the valve cover and see if oil is getting to the top of the engine.

Posted By: Dave H (NE)
Date Posted: 21 Mar 2019 at 10:17pm

the oil pressure regulating valve is set at 35 psi.

Posted By: Norm Meinert
Date Posted: 21 Mar 2019 at 10:28pm

the d-17 diesel engine has more oil pressure than the gas engine. it needs a special gauge for that pressure. call Mark at 440-570-3653 for the gauge, made in the USA.

Posted By: Calvin Schmidt
Date Posted: 22 Mar 2019 at 5:54am

Norm is right. Gas gauge is 0-30 psi. Diesel is 0-60 psi (possibly 0-80 psi)

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Nothing is impossible if it is properly financed

Posted By: MACK
Date Posted: 22 Mar 2019 at 7:20am

The 262 always run good pressure. If it don't then you have a problem. MACK

Posted By: DrAllis
Date Posted: 22 Mar 2019 at 7:23am

The concerned poster doesn't specify which gas D-17 he has either. Prior to full flow oiling system had fair oil pressure on a good day. Any series 4 gasser I've been around usually has the gauge pegged until you idle it down hot.

Posted By: Dave (NE)
Date Posted: 22 Mar 2019 at 10:01am

The gas D17 I have is also a series IV. Kind of sounds like I might have the wrong gauge. I have changed oil and filter. Guess I need to get it over to repair man and see if he can test the pressure for me. Thanks for the input. Dave

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Do not argue with an idiot. He will drag you down to his level and beat you with experience. Mark Twain.

Posted By: Brian Jasper co. Ia
Date Posted: 22 Mar 2019 at 5:26pm

The spec for oil pressure is 35 psi. Check what yours is with a gauge with numbers. There is a pressure regulator on the left side of the block near the front. The outflow of the regulator oils the cam and injection pump gears. Having the pressure set too high can starve the gears for oil. On a hot engine, run it at full speed and adjust it down to 35 psi if it's higher.

This is on the diesel BTW....

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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford